佩服 means that you have an admiration for sb. They set up great examples for you. There are sth about him/her really make you respect and give you the motivation to improve yourself.羡慕 means that you envy others. For example, they own sth that you dont have, or they are more competent that you in some aspects. this will encourage you to make more efforts.佩服 is more advanced than 羡慕.